CN103796465A - Low-frequency demagnetization damping and noise reducing shield - Google Patents
Low-frequency demagnetization damping and noise reducing shield Download PDFInfo
- Publication number
- CN103796465A CN103796465A CN201410080776.9A CN201410080776A CN103796465A CN 103796465 A CN103796465 A CN 103796465A CN 201410080776 A CN201410080776 A CN 201410080776A CN 103796465 A CN103796465 A CN 103796465A
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- Prior art keywords
- square cabinet
- cabinet
- low frequency
- protective cover
- described square
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- 238000013016 damping Methods 0.000 title claims abstract description 23
- 230000005347 demagnetization Effects 0.000 title claims abstract description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- 239000011358 absorbing material Substances 0.000 claims abstract description 7
- 229920002521 macromolecule Polymers 0.000 claims abstract description 5
- 230000001681 protective effect Effects 0.000 claims description 16
- 239000004411 aluminium Substances 0.000 claims description 9
- 230000000873 masking effect Effects 0.000 claims description 8
- 239000007799 cork Substances 0.000 claims description 4
- 239000000696 magnetic material Substances 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000004020 conductor Substances 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000007590 electrostatic spraying Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a low-frequency demagnetization damping and noise reducing shield which comprises a square cabinet body in a hexahedron shape. A magnetic shielding layer made of magneto conductive materials is arranged on the outer surface of the square cabinet body. A cabinet door is arranged on the side wall of the square cabinet body, and a plurality of wave guide openings are formed in the edge of the cabinet door. A porous aluminum plate is arranged on the inner wall face of the square cabinet body, and a sound absorbing layer made of macromolecule sound absorbing materials is arranged between the porous aluminum plate and the magnetic shielding layer. A plurality of vent holes are formed in the top face of the square cabinet body, and an exhaust fan is embedded in each vent hole. An anti-interference sealing cabinet used for storing an electron microscope has the advantages of being capable of effectively preventing the electron microscope and other precision equipment from interference of external electromagnetism and noise environments, improving detection precision, facilitating miniaturization, and being convenient to move, low in cost, and attractive and elegant in appearance, and the like.
Description
Technical field
The present invention relates to a kind of low frequency demagnetization damping noise abatement protective cover, for precision equipments such as the needs electron microscope (EMS) that magnetic field, vibrations and noise protect, eliminate or weaken to external world, mask aligner, nulcear magnetic resonance (NMR) (MRI).
Background technology
Electron microscope is high-velocity electrons imagings under electromagnetic lens effect, conventionally even observes under 1,000,000 times at tens thousand of times.Electron microscope, due to its feature such as directly perceived, convenient, is widely used in the field such as material, life science.
Because the charged particle beam flying in electron microscope lens barrel is very easily subject to external interference, thus the scalloping that makes to obtain distortion, and various types of electron microscopes have certain requirement to surrounding environment as magnetic field, vibration and noise.Although magnetic field, vibrations and noise can not make electron microscope itself be damaged, proper motion track that all can interference fringe beam of charged particles, affects the experimental result of electron microscope, makes it can not reach due precision.
The electron microscope of different manufacturers is different to the requirement of surrounding environment.Even same producer but the different electron microscope of model is also different to the requirement of surrounding environment, not unified standard.Electron microscope manufacturer all can, before electron microscope is installed, carry out special detection to the place that electron microscope will be installed.If surrounding environment can not meet the requirements, should take appropriate measures and solve or improve.
In prior art, generally all need to set up the special sealing room of electron microscope, but this existing sealing room is all generally immovable building, and floor space is larger, building cost is higher; And the place of opening the door in room easily exists gap, easily cause the magnetic line of force to leak, thereby affect the accuracy of detection of electron microscope.
Summary of the invention
The present invention is the weak point existing in above-mentioned prior art for avoiding, a kind of low frequency demagnetization damping noise abatement protection is provided, for the precision equipment protection of low frequency magnetic field, vibrations and noise jamming to external world such as electron microscope, with guarantee electron microscope operational environment sealing, improve by the accuracy of detection of safeguard and serviceability.
The present invention be technical solution problem by the following technical solutions.
Low frequency demagnetization damping noise abatement protective cover, its design feature is, comprises the square cabinet that is hexahedron, is provided with one deck and makes magnetic masking layer by permeability magnetic material on the outer surface of described square cabinet; On the sidewall of described square cabinet, be provided with one or more cabinet doors of outwards opening, on described cabinet door, be provided with one or more door handles; The Men Bianchu of described cabinet door is provided with multiple waveguide mouths;
The internal face of described square cabinet is porous aluminium sheet; Between described porous aluminium sheet and described magnetic masking layer, be provided with the sound absorbing layer that macromolecule sound-absorbing material is made; The end face of described square cabinet is provided with multiple ventilating openings, is all embedded with a ventilating fan in each ventilating opening of described multiple ventilating openings.
The design feature of low frequency demagnetization damping noise abatement protective cover of the present invention is also:
The bottom of described cabinet door is provided with an air inlet, on described air inlet, is provided with screen pack.
On the base plate of described square cabinet, be provided with for described square cabinet being fixed on to ground bolt hole by bolt.
On the base plate of described square cabinet, be provided with waveguide mouth, in described waveguide mouth, be provided with waveguide mouth cork.
In described square cabinet, dispose a set of active low frequency demagnetizer.
Compared with the prior art, beneficial effect of the present invention is embodied in:
Low frequency demagnetization damping noise abatement protective cover of the present invention has the technical characterstic of the following aspects.
1) guarantee that electron microscope is not disturbed by external electromagnetic and noise circumstance, reduce external shock environmental interference;
2) can keep the basic setup in former room, not because secondary decoration causes waste, avoid the damage to building integral structure completely;
3) volume miniaturization (be only existing magnetic screen volume 20 to a thirtieth), changing site operation is factory process and on-the-spot assembling fast.Another advantage of volume miniaturization be greatly reduce to valuable careat take (integrated scheme itself to careat only take for existing magnetic screen scheme ten to 1/15th);
4) product modular, can need flexible combination collocation according to difference;
5) cost performance improves, and absolute price declines, and reduces user's acquisition cost.According to measuring and calculating, the price of single magnetic screen pattern is about 1/3rd of existing magnetic screen price; After having combined the function of damping and noise reduction, price is reduced to below 1/5th of existing enhancement of environment scheme especially;
6) good looking appearance is generous.Product is cube case structure, and around all there is dodge gate at four sides with handled easily and maintenance.Appearance is electrostatic spraying baking vanish.
Low frequency demagnetization damping noise abatement protective cover of the present invention, need the precision instrument class of demagnetization, damping, noise abatement for electron microscope, mask aligner, nulcear magnetic resonance (NMR) etc., have can effectively guarantee electron microscope be not subject to extraneous low frequency magnetic field, vibrations noise interference, improve equipment accuracy of detection and performance, be convenient to the advantages such as the low and good looking appearance of miniaturization, conveniently moving, cost is generous.
Accompanying drawing explanation
Fig. 1 is the front view of low frequency demagnetization damping noise abatement protective cover of the present invention.
Fig. 2 is low frequency demagnetization damping noise abatement protective cover vertical view of the present invention.
Fig. 3 is the schematic internal view of low frequency demagnetization damping noise abatement protective cover of the present invention.
Fig. 4 is the base plate of low frequency demagnetization damping noise abatement protective cover of the present invention and the sectional drawing of sidewall.
In Fig. 1～Fig. 4, label is: 1 square cabinet, 2 magnetic masking layers, 3 sound absorbing layers, 4 porous aluminium sheets, 5 cabinet doors, 6 door handles, 7 waveguide mouths, 8 ventilating openings, 9 ventilating fans, 10 base plates, 11 electron microscope bases, 12 electron microscopes, 13 air inlets, 14 screen packs, 15 bolts hole, 16 waveguide mouth corks, 17 damping devices.
Below pass through embodiment, and the invention will be further described by reference to the accompanying drawings.
Embodiment
Referring to Fig. 1～Fig. 4, low frequency demagnetization damping noise abatement protective cover, it comprises the square cabinet 1 that is hexahedron, is provided with one deck and makes magnetic masking layer 2 by permeability magnetic material on the outer surface of described square cabinet 1; On the sidewall of described square cabinet 1, be provided with one or more cabinet doors 5 of outwards opening, on described cabinet door 5, be provided with one or more door handles 6; The Men Bianchu of described cabinet door 5 is provided with multiple waveguide mouths 7;
The internal face of described square cabinet 1 is porous aluminium sheet 4; Between described porous aluminium sheet 4 and described magnetic masking layer 2, be provided with the sound absorbing layer 3 that macromolecule sound-absorbing material is made; The end face of described square cabinet 1 is provided with multiple ventilating openings 8, and each ventilating openings 8 of described multiple ventilating openings 8 is interior is all embedded with a ventilating fan 9.
The bottom of described cabinet door 5 is provided with an air inlet 13, on described air inlet 13, is provided with screen pack 14.
On the base plate 10 of described square cabinet 1, be provided with for described square cabinet 1 being fixed on to ground bolt hole 15 by bolt.
On the base plate 10 of described square cabinet 1, be provided with waveguide mouth 7, in described waveguide mouth 7, be provided with waveguide mouth cork 16.
In described square cabinet 1, dispose a set of active low frequency demagnetizer, for eliminating NEAR DC, quasi-dc magnetic fields (claiming again D.C. magnetic field).
Base plate, top board and the sidewall of square cabinet included three layers, and outermost layer is the magnetic masking layer that permeability magnetic material is made, intermediate layer be the housing made of sound-absorbing material as sound absorbing layer, innermost layer is the porous aluminium sheet for reducing environmental noise.On sidewall, be provided with the cabinet door of external-open, can facilitate the carrying out of the work such as operation, maintenance and the maintenance of electron microscope.Outward swinging door makes to open the door to close the door does not affect the equipment work in cabinet door.Sound-absorbing material is mainly macromolecular material asbestos etc., and other,, as cork etc., is also macromolecular material.Described square cabinet 1 is for placing the space of the equipment such as electron microscope, and electron microscope 12 and electron microscope base 11 are electron microscope part, and described bottom is arranged on the base plate 10 of described square cabinet 1 by damping device 17.
For convenience of operation, maintenance and the maintenance of electron microscope, can on of a square cabinet sidewall or multiple sidewall, offer cabinet door.The appearance of square cabinet is the baking vanish layer of electrostatic spraying baking vanish.
Length is generally 1.2～3.8m, determines according to equipment, and handle for opening door position and the direction of opening the door are also determined by equipment.
On the place of opening the door, air inlet and ventilating opening and base plate, be provided with many places waveguide mouth, can guarantee that the magnetic line of force in shield can be not excessive.
According to the special mechanism of low frequency electromagnetic shielding (adopting parallel circuits shunting for the magnetic-field component of low frequency electromagnetic field), adopt magnetic conductive material, for the equipment airtight rectangular hexahedron of tailoing, low frequency electromagnetic can be disturbed be reduced to original below 1/20th.All the joint of perforate and Ge Men and framework is waveguide mouth, can guarantee that the magnetic line of force in shield can be not excessive.All the joint of perforate and Ge Men and framework is waveguide mouth.
The rectangular hexahedron bottom surface of special processing guarantees that the resonance of rectangular hexahedron can be transmitted to electron microscope gets on, and can also add magnetic vibration reducing module, if desired to improve vibration environment; Also active low frequency demagnetizer be can add for elimination or NEAR DC, quasi-dc magnetic fields (claiming again D.C. magnetic field) reduced.
Airtight rectangular hexahedron inner surface is porous aluminium sheet, and its inner macromolecule sound-absorbing material in addition, can reduce ambient noise 18～28 decibels, improves noise circumstance.
Claims (5)
1. low frequency demagnetization damping noise abatement protective cover, is characterized in that, comprises the square cabinet (1) that is hexahedron, is provided with one deck and makes magnetic masking layer (2) by permeability magnetic material on the outer surface of described square cabinet (1); On the sidewall of described square cabinet (1), be provided with one or more cabinet doors (5) of outwards opening, on described cabinet door (5), be provided with one or more door handles (6); The Men Bianchu of described cabinet door (5) is provided with multiple waveguide mouths (7).
The internal face of described square cabinet (1) is porous aluminium sheet (4); Between described porous aluminium sheet (4) and described magnetic masking layer (2), be provided with the sound absorbing layer (3) that macromolecule sound-absorbing material is made; The end face of described square cabinet (1) is provided with multiple ventilating openings (8), in each ventilating opening (8) of described multiple ventilating openings (8), is all embedded with a ventilating fan (9).
2. low frequency demagnetization damping noise abatement protective cover according to claim 1, is characterized in that, the bottom of described cabinet door (5) is provided with an air inlet (13), is provided with screen pack (14) on described air port (13).
3. according to the low frequency demagnetization damping noise abatement protective cover described in claim 1 and 2, it is characterized in that, on the base plate (10) of described square cabinet (1), be provided with for described square cabinet (1) being fixed on to ground bolt hole (15) by bolt.
4. low frequency demagnetization damping noise abatement protective cover according to claim 1, is characterized in that, on the base plate (10) of described square cabinet (1), is provided with waveguide mouth (7), is provided with waveguide mouth cork (16) in described waveguide mouth (7).
5. low frequency demagnetization damping noise abatement protective cover according to claim 1, is characterized in that, disposes a set of active low frequency demagnetizer in described square cabinet (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410080776.9A CN103796465A (en) | 2014-03-06 | 2014-03-06 | Low-frequency demagnetization damping and noise reducing shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410080776.9A CN103796465A (en) | 2014-03-06 | 2014-03-06 | Low-frequency demagnetization damping and noise reducing shield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103796465A true CN103796465A (en) | 2014-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410080776.9A Pending CN103796465A (en) | 2014-03-06 | 2014-03-06 | Low-frequency demagnetization damping and noise reducing shield |
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| Country | Link |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011165917A (en) * | 2010-02-10 | 2011-08-25 | Seiko Epson Corp | Magnetic shield box |
| CN202168607U (en) * | 2011-07-01 | 2012-03-21 | 李海军 | Novel anti-magnetic cabinet |
| CN203066510U (en) * | 2012-12-11 | 2013-07-17 | 东莞市正亚机械设备有限公司 | A shielded soundproof room |
| CN203166773U (en) * | 2012-12-28 | 2013-08-28 | 中国电力科学研究院 | Photovoltaic inverter alternating-current cabinet |
| CN203233606U (en) * | 2013-03-12 | 2013-10-09 | 安方高科电磁安全技术(北京)有限公司 | Intelligent constant-temperature air-conditioning electromagnetic shielding cabinet |
| CN203912377U (en) * | 2014-03-06 | 2014-10-29 | 安徽建永商贸有限公司 | Low-frequency demagnetization damping and noise reducing shield |
-
2014
- 2014-03-06 CN CN201410080776.9A patent/CN103796465A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011165917A (en) * | 2010-02-10 | 2011-08-25 | Seiko Epson Corp | Magnetic shield box |
| CN202168607U (en) * | 2011-07-01 | 2012-03-21 | 李海军 | Novel anti-magnetic cabinet |
| CN203066510U (en) * | 2012-12-11 | 2013-07-17 | 东莞市正亚机械设备有限公司 | A shielded soundproof room |
| CN203166773U (en) * | 2012-12-28 | 2013-08-28 | 中国电力科学研究院 | Photovoltaic inverter alternating-current cabinet |
| CN203233606U (en) * | 2013-03-12 | 2013-10-09 | 安方高科电磁安全技术(北京)有限公司 | Intelligent constant-temperature air-conditioning electromagnetic shielding cabinet |
| CN203912377U (en) * | 2014-03-06 | 2014-10-29 | 安徽建永商贸有限公司 | Low-frequency demagnetization damping and noise reducing shield |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xu Yuanming Inventor before: Zhang Xiaojian |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: ZHANG XIAOJIAN TO: XU YUANMING |
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| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 100 CBD Central Plaza, No. 369 Changjiang Road in Luyang District of Hefei City, Anhui province 230041 1 18 storey buildings Applicant after: Anhui Jian Yong Electronic Technology Co., Ltd. Address before: The Yangtze River Road in Luyang District of Hefei City, Anhui province 230041 No. 369 100 CBD office 2301 Applicant before: ANHUI JIANYONG TRADE CO., LTD. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: ANHUI JIANYONG TRADE AND COMMERCE CO., LTD. TO: ANHUI JIANYONG ELECTRONICS TECHNOLOGY CO., LTD. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140514 |